1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 #include "lpsched.h" 34 35 /* 36 * terminate() - STOP A CHILD PROCESS 37 * 38 * Note: If you're trying to debug lpsched, and worried about 39 * seeing lots of calls to terminate() in the debug output, 40 * don't be; it gets called once for each entry in the child 41 * process table, whether or not there's such a child. 42 */ 43 44 void 45 terminate(register EXEC *ep) 46 { 47 int retries; /* fix for sunsoft bugid 1108465 */ 48 49 if (ep->pid <= 0) 50 return; 51 52 if (ep->flags & EXF_KILLED) 53 return; 54 ep->flags |= EXF_KILLED; 55 56 /* 57 * Theoretically, the following "if-then" is not needed, 58 * but there's some bug in the code that occasionally 59 * prevents us from hearing from a finished child. 60 * (Kill -9 on the child would do that, of course, but 61 * the problem has occurred in other cases.) 62 */ 63 if (kill(-ep->pid, SIGTERM) == -1 && errno == ESRCH) { 64 ep->pid = -99; 65 ep->status = SIGTERM; 66 ep->Errno = 0; 67 DoneChildren++; 68 return; 69 } 70 71 /* 72 * Start fix for sunsoft bugid 1108465 73 * the original code here was extremely optimistic, and 74 * under certain circumstances, the pid's would still be 75 * left around. here we get really serious about killing 76 * the sucker. 77 * we patiently wait for the pid to die. if it doesn't 78 * do so in a reasonable amount of time, we get more forceful. 79 * note that the original "ep->pid == -99" is a crude hack; 80 * but that the convention is being followed. sigh. 81 */ 82 for (retries = 5; retries > 0; retries--) { 83 /* see if the process is still there */ 84 if ((kill(-ep->pid, 0) == -1) && (errno == ESRCH)) { 85 ep->pid = -99; 86 ep->status = SIGTERM; 87 ep->Errno = 0; 88 DoneChildren++; 89 return; 90 } else if (errno == EINTR) 91 break; 92 93 sleep(2); 94 } 95 96 /* if it's still not dead, then get more forceful */ 97 for (retries = 5; retries > 0; retries--) { 98 if ((kill(-ep->pid, SIGKILL) == -1) && (errno == ESRCH)) { 99 ep->pid = -99; 100 ep->status = SIGTERM; 101 ep->Errno = 0; 102 DoneChildren++; 103 return; 104 } 105 sleep(3); 106 } 107 /* end of sunsoft bugfix 1108465 */ 108 /* 109 * well hardkill didn't work so just flag this request as done 110 */ 111 ep->pid = -99; 112 ep->status = SIGTERM; 113 ep->Errno = 0; 114 DoneChildren++; 115 } 116